A quick note about the Medieval Warm Period. Temperatures around 1000AD were at similar levels to today in northern Europe across to Greenland. Recent data indicates that the MWP was a local phenomena and mostly confined to that region, rather than a global temperature increase. Current temperature reconstructions from other parts of the globe show no such warming.
Sunday, December 6, 2009
Global Average Temperature Reconstructions
The most famous temperature reconstruction graph is that done by Mann, 1999. But there are many other, independent reconstructions: